Android/Java

How to download files using web cache validation (ETag) - Android

How to write to and read from text files in Java/Android

How to encrypt strings using AES - Android/Java

How to make a TextView underlined

How to dynamically change the text of an android widget

How to parse and create JSON string Android/Java

How to download a file/web page using HTTP on Android/Java

How to programatically center text horizontally using TextView

How to connect to an HTTPS web server using self-signed certificates (Android/Java)

How to make a TextView (or any other view) clickable on Android

How to add an image to a button on Android - ImageButton